Electric furnace.



PATENTED MAY 1, 1906.

- 5. L. HARTENSTEIN. I ELEGTRK? FURNACE. I APPLIOATIOH FILED JULYZS.1902. RENEWED SEPT. 30, 1905.

6 SHEETS-SHEET 1v MCAW PATBNTED MAY 1; 1906.

H. L. HARTENSTEIN, ELEG'ERIG FURNACE. APILIOATIEON FILED JULY 26. 1902.RENEWED SEPT. 30, 1905.

' a SHEETS-SHEET 2.

WMW

- 1 l Vfmqassas No. 819,224. PATENTED MAY 1, 1906.

H. L HARTENSTEIN.

ELEGTRIG FURNACE. APPLICATION FILED JULY26, 1902. RENEWED SEPT.30, 1905.

B SHEETS-SHLET 3.

- U ,,,vvm

No. 819,224. PATENTED MAY 1, 1906.

L. HARTENSTEIN. ELECTRIC FURNACE.

APPLICATION FILED JULY26. 1903. RENEWED SEPT 30, 1905.

6 SHEETS-$111131 5.

WJTEEEH No. 819,224. PATENTED MAY 1, 1906 H. L. HARTENSTEIN,

ELECTRIC FURNACE;

APPLICATION FILED JULY 26. 1902. RENEWED SEPT. 30, 1905.

s SHEETSSHEET 6.

wiffm- I 11km U NiT surrns HERMAN L. HARTENSTEIN,-OF onioA PA ENT cationco. 1LLIN'0IS, ASSIGNOR, BY EsNe ASSIGNMENTS, TO 'ELECTRO- CHEMICAL &DEVELOPMENT COMPANY, or g I PIERRE, SOUTH DAKOTA. A CORPORATION OF SOUTHDAKOTA?" ELECTRIC #u NAcE.

Specification of Letters Patent.

' Patented ma 1,1eoef.

Application filed July 26, 1902. Renewed Septemberiii), 1905. Serial No.280.729.

T 00M whom it may concern:

Be it known that L-l lnntms L. HARTENT sTEIN, a citizen of the UnitedStates, residing at Chicago, in'the countyof Cook and State of Illinoishave invented a new and useful Electric Fu1'nace,.of which the followingis a This invention relates to electric furnaces.

The o'bjectof the invention is to simplify andimprove electric furnaces,and especially -"furnaces of this class designed for usein the placed.

. nianufactul'e of calcium carbid. 1

1 A further objectof the invention is to provide means whereby theposition of the carbonsmay be readily adjustedwith reference toeachother and with reference-to the ma vterial to be fused or irelted.

' A further object of theinvention is to ro- -vide an improvedconstruction of car on holder for use in electric furnaces which 1Ssimple and 'eflicient and wherein the carbon elements may be readilyremoved or re Other objects of the invention'will appear more'fullyhereinafter.

The invention consists substantially in the construction, combination,location, and ar rangement of parts, all as will be'nxore fullyhereinafter set forth, as shown in the accom panying drawings, andfinally pointed out in the appended claims.

Referring to the accompanying drawings, and to the val ious views andreference-signs appea ing thereon, Figure 1 is a view in front e evationof a const. notion of elect; 1c furnace embodying the principles of myinvention.

,Fig. -2'-is' a horizontal sectional view on the line 2 2 of Fig. 3looking in the direction of the arrows. F i 3 is a view in verticalsection on the line 3 3 of Fig. 2 looking in the di' 'ection ofthe8;.1OWS. Fig. 4 is a view sin ilar to Fig. 3, taken in a plane at rightangles to the planeof section of said Fig. 3 and 5 on-theline 4.4,ofFig. Zlooking in the direction of the arrows. .Fig. 5 is a detail sec;

tion'al view on the line '5 5 of Fig. 3 looking in the direction of thearrows. 6 is a a b. *oken detail view in section on the line 6 6 of Fig.2. Fig. 7 is'a broken detail view in side elevation of. thecarbon-holder-ad'ustingmechanism. Fig. 8 is a broken detai. view, Insideelevation, of the carbonholdcr, one of the cai-bons being shown in theact of being removed or inserted in place. Fig. 9 is a d etail view-insection on the line 99 of Fi 8 looking in the directionof the arrows. 10is a brokenxdetail view in section on the line 10 10 of Fig. 8 lookingin the direction'of the arrows. Fig. 11 is a broken detail vicw froi'nthe holder.

hon-holder and means for closing the openin r in thefninace-casing'thr'ough which the ho der projects and operates. Figs-15isa detail view in section on the line 1515 of Fig- 14. Fig. 16 is adetached detail view in seer tion on the line 16 16*of Fig. 2 looking inthe direction of the arrows and showing the means for guiding andtilting .the w n holder. 1 Fig. 17 is a detail view insertion Ithrough-a discharge-opening. The same part is designated bythejsang ereference-sign wherever it occurs throughout the'several views.

In the manufacture of carbolite or calcium o I carbid a charge of themate into an electric or other furnz-s.= z-.z

charge is'subjected to a degree of heat sulfii cient to fuse or melt thesame, the melts product forming the carbi'd to be produced;j- Where anelectric furnace is employed foref footing the fusing or. converting oeration, the charge is delivered into a suitab e chain ber containintric ClI'CUlt.

carbons arranged in an elecis delivered 1, where such Furrent issuppliecl'to said ca cuit to form an are between the carbons.

the efficient operation of an electric furnace and inthe manufacture ofcarbid it is impor tant to provide a construction and arrangementwhereby the voltage of the current'eni- 'ployed may be varied accordingto the amount'of charge delivered to the furnacechamber or to the'conditionsof the carbon' electrodes; and to this end in carrying out myinvention'I propose to provide a construction and arran 'ement whereinthe car. bon electrodes maydae adwstable toward or from. each other. Ialso propose to provide a construction wherein'the carbons or electrodesmay be adjusted longitudinally, wherein the slant or. inclinations ofthefcarlions or electrodes with reference to. each i other may bereadily adjusted,'end wherein the carbons or electrodes may beindependcntly adjustable, thereby enabling me to arrange the carbons orelectrodes according to 5 the amount of the charge delivered to thfurnace-chamber or according to the conditionof the carbons orelectrodes themselves.

It is also important in apparatus of this nature to provide meanswhereby the carbons or electrodes while efliciently clamped or held inplace during operation may be readily removed or replaced when desiredor when worn or burned oil". I therefore propose in carrying out myinvention to provides-construction of carbon holder wherein provisionis-made for the ready removal or replace ment o the carbons nstitutingth lec trodes, i

. It is also desirable in order t secure the best results that-thecharge to be operated on in, he urn ewbcmber be delivered into .thespace between the electrodes or. carbons rather-than outside of orsurrounding the carbons. In carrying out my invention, there f re, I prpos to provide'means whereby the charge'is delivered into thefurnacewchamber at a point between the carbons or electrodes,

In the operation of an apparatus of the character referred to it isdesirable to provide agi in the too rapid burning out of the car bol-holders. means for protecting the holders as much as possible from theheat generated in the his aace-chamben I11 apparatus of the class towhich my invclltion relates it is desirable to provide means whereby thefurnace-chamber may be cleaned out whenever desired. 1' thereforepropose in carrying out my invention to 'prOVide means for rcadilvremoving the furnace-chamb r and dumping the contents thereof to cleanout any slag or incrusted material that may form or adhere to the innersurface of the chamber. These and other objects of my invention,hereinafter to be referred to, are accomplished'in the construction.illustrated in the KOQDIHPQIlylDg drawings, wherein- Reference-sigh Adesignates the furnacechambcr', which may be of suitable constructionand arrangement and suitably lined, if desired, and of suitableproportions or size dependent upon the reducing capacity and power atwhich it is desired town the plant.

it designe'es'a casing suitably supported and preferably in v clowns. orposts b I of albopper directly over tlieiior- A and delivering into saidfur cc chamber. Commuiaicating with the lug B is a stock D to carry offthe smoke, 19s, or other similar products of combusd on in the furi'iacecbsmber.

= member-A is proviced with operating on track-rail said chamber may beI therefore propose to provide sis e /4 I brought into position beneaththe hopper or /"caaing or hop er B. Qnl a slight clearance between theupper edge 0 the furnace-chem her and the lower edge or delivery-mohthofthe casing or hopper B is provided, so that T i only a slight movementof the mm is neces sary to raise the furnace'chamber into bearing'against hopper or casin B. The supply oi operating medium to and fromcylinder H may be controlled by means of a hand-operated valve 5 in anysuitable or convenient manner.

If desired, the ram G may be provided with ratcliet teeth, (indicated atK, Fi 3,) with which cooperates a gravity-pawl E to maintein said ram inproper position when raised without dc )encling upon the operating medium in, cylinder H, When it is desired to remove the furnacemhamber,the gravitypawl L is released from engagement with the v ratchet-teethK, and the control-valve J is manipulated to permit the ram'G to descendsufficiently for the truck-wheels E to bear upon the track-rails F and-to receive the weight of the furnace-chamber, and said furnace-chambermay then be shoved or pushed or otherwise moved along the track-rails Fand from beneath the hopper or casing B. The bottom of thefurnacechamber A is formed into a door M, hinged or pivoted, as at N.(See Fig. 3.) To this hinged or piv' otcd .door is connected one end ofa link 0. To the other end of said link is pivotally connected one endof a lever P, said lever being pivoted, as ct Q, to a fixed art orbracket carried by the furnace-chem er. A istonrod R is pivotallyconnected to lever ,said piston-rod being operated from a cylinder S,carried on the side of the furnace chainber and to or from which anoperating medium may be supplied or exhausted from any convenient sourceby means of a control-valve T.

From the foregoing description it will be seen that by suitablycontrolling the operating medium in cylinder S the hinged or pivotcddoor M of the furnacechamber maly be opened or closed, as may bedesired.

in order to enable the fused or converted mess to be tapped from thefurnace-chamber, i provide said furnace-chamber with disclings-openings, (indicated at A,) and in order to protect saiddischarge-openings, as

well as the outer casing of the furnace-chamher, I employ slabs orplates B, suitably bolted on the outside of the furnace-chamber -casingand with openings C therethrou h ar- I ranged to be brought intocoinciding relation with respect'to the discharge-openings A.

i In practice I prefer to employ a separate slab or plate B for eachdischarge-opening A, so that in case a slab or plate is burned off orinjuredit may be removed and replaced without disturbingthe ,other slabsor plates B.

Preferably I provide each slab or plate B (see Fig. 17) with a.delivery-spout D to fa cilitate the discharge of the molten materialfrom the furnace-chamber,

I-will now'describ'e the means for clamping or supporting thecarbonelectrodes. Ordinarily the electrodes employed are made of carbon slabsE, though I do not desire to be limited in this respect. each carbonslab is provided with a groove or recess F. G designates a block'havinga seat formed therein adapted to receive the end ofa carbon orislab E.Each block G is provided witha' lug or projection H, adapted to bereceived in the slot orrecess F (see Fig. 13) formed in the carbon.- Thecarbon is inserted laterally 'into place in a block G (see liligs. 10and 11) and is efficiently supplate firmly against the car-bonerelectrode E thereby maintaining eflici'ent electrical conortedand heldin place and prevented from oyip'ng out b v the engagement of the rib orwithin t e recess or slot F.

- In order to insure. eflicient'contact and at. the same tune to avoidthe bearing of a contact or ressi re' screw directly against the carbons ab, ,I'-employ a plate J, of metal,

' copper, or otliiier suitable material, and arrange the same to bear aai-nst the side of the can bon slab-or'lectro e E", andthe block G" issuitably recessed, as shown at K", to receive the plate orblock J:-, Aset-screw L, tapped through block J and bearing against the block orplate J, ser'ties'to press said block or tact of said electrode orcarbon with block G;

In order to'enable the; charge of material to" be -delivered into thespace between the can holder provideg y 'ceivetheblocks G. I havqshownthe hold-r. '66

' carbons E; but it is obvious bons or electrodes, 1 provide the casingor hopper Bwitha charging-opening (indicated at T and so. situated with.referericeto the carbons orelectrodes that when the charge is deliveredthrough said chewing-opening said charge will drop into place betweenthe elec trodes or carbons, as most'clearly shown in vith' se ts adaptedto re ersM arranged to r eceive' sex blocks G and that the holders maybeconstructed to receive any desired number of blocks G. or carbons E. Theblocks Q may be independently and remov ably held in place inany-suitable manner.

At its upper end the char e delivered to the furnace-chamber Mdes'gnates a carbon I, have shown a convenient arrangement wherein astrap N (see Figs. 8" and '12) is hinged or pivoted, asa-t O to a' lugformed on block G and arranged to be swung over a lug or extension P.formed on head M"; A set screw Q, tapped. throughstrap N and bearmg uponlug P, serves to draw the head G firmly andeflieiently into place andcontact i in its seat in head M. i

From the foregoing: description .it will be seen that any individualcarbon or electrode may be readily and quickly removed orreplacedwithout disturbing the others by si nply loosening up onset-screw Q and swinging the yoke or stra .N out of engaging relationwith respect to 11g P, thereby leavingblock G, carrying a carbon, freeto drop out of place, and-the carbonor electrode may be the number ofcarbon electrodes employed,

as desired, and accordin to the amount of.

or accor ing to the current emplo ed.

Tl will now describe means for adjusting the inclination of the carbonsor electrodes with res set to each otherfor their proximity to siteother and their. position with reference to the furnace-chamber.

Each holder M is carried b-ya support, (indicated generally byreference-sign S,) sald holder extending in a generally vertical direction and out through a slot or o eni ng T inthe roof or an extensionW of t e roof of the. casing or hopper B. The su port S is rovided witha rack. A, arrange to extend ongitudinally with respect thereto and tobe engaged by .a' pinion-B, mounted on a shaft I C, arranged to extendtransversely ojthe fur nabs-chamber and carried ina's1id'e boxe -D%,.(see Fi 14,) the ends of said shaftgprojecting throng horizontal slotsor op'emn di E}, formed in the ,side walls of 'casinggor LQPPQP B. Byimparting rotation t'ofs tical adjustment of support ed in order to'roject the carbons carried b .s'ai sup ort moreor less into'th e 1'29,

furnacec amber,t e upperend of support S" I slidingjhrough abearing-support orslideguide arranged to receive thessame and suitablymounted the top plate or'roof of the hopper on casing B ortheextension-W of, as will be more fully explained herei ft'cr. Surroundingshaft 0 is a sleeve made'gin-sec tions', designated on the drawings byreference-signs F GK (8% Fig. 2..) Uponthe adjacent ends ofsleeve-sectionsQF? G? are mounted friction-rollers H arr'angedtobearagainst the rear or other side ol holder S. (See Fig. i! 6.) Alsomounted upon the sojocent or roxilnnte ends of sleeve-sections l" G arep ates J" K each plate being provided with anglcarms L M projecting ininclined relation with respect to each other and inwardly beyond theinner side of support S. The arms if M of plate J are spaced apart fromthe arms L Al of plate K o distance suliicient to receive the support Srehetween, and the lune. ends of arms L M oi plate 5 are respectivlsybolted to the inner ends of arms L M of new K the securingbolts beingindicated nit N Mounted upon each of the bolts N 0 (see Fig. 16) arebearing-rollers P Q arranged to bear against the inner side or surfaceof support S. In order to still further insure a lirni bolting togetherof the plates J K said plates are provided with outwsully-extendingprojections R suitably bolted together, as at From the foregoingdescription it will be seen that by rotating one of the sleeve-sectionsG such rotation is imparted to the other of said sleeve-sections, andthe support S is rocked in one direction or the other according to thedirection in which the sleevesection is rotated about the bearing ofsaid support upon rollers H as a fulcrum, while at the same timeremaining held place be tween the arms if M and between. the rollers PQ, engaging the some on the inner edge thereof, and rollers H engagingthe same on the outer edge thereof.

Rotation may he imparted to shaft C and to the sleeve-sections F G inany suitable or convenient manner. A simple arrangement is shown whereinworm-gears (see Fig. 2} are respectively mounted upon said shaft andsaid sleeve-section F said worm-gears meshing with and driven from WormsD. The worm C is driven from a hand-wheel E through the intermeshing Fand similarly the worm D is driven from a handwheel G through theintermeshing gears H all or these parts being suitably 'ournaled ormounted in -one of the slide'blocks D in which the sleeve-sections andshaft C are journaled.

From the foregoing description it will be seen that by manipulating thehand-wheel G the shaft C is rotated to vertically adjust the carbons orelectrodes, and by manipulating the handqvhoel E the sleeve-sections F Gare rotated to adjust the angle or" inclination of the carbon orelectrode.

As above stated, the shaft C and the sleeve-sectionsl G extendtransversely of the casing or hopper B end project through slots oropenings E andare j ournaled or carried in slide-blocks D Theseslide-blocks or boxes are mounted to travel horizontally upon beams I.(See Fig. 5.) Reference-sign K designates racks suitably supported inconvenient relation to be engaged by pinions wvill be seen that theelectrodes ll". mounted upon it shalt hl,a1id to which heft rotetion mayhe imparted any suitable manner s, for instance, by ineansoi' thehand-wheel From this description it or carbon it will also holdernryhea'ljusted lo v be sec cm th iorc' n9 description that the JtIUCal,laterehcr inclined adjustments are wholly independent of each other,thereby enabling corresponding and independent adjustments oi the carbonor electriido to he made. i

in practice I prefer to employ two or more supports and carbomholrlerssets of car,

bone or electrodes, and the adjustments.

above described enable me to independcntl ad ust each set of carbons orelectrodes Wit 1 reference to the other, and this I regard as animportant feature of my invention, as it enables me to quickly adjustthe relative positions or proximity or inclination of the electrodes orcarbons to accommodate any desired charge any desired condition ofelectric current employed. in Fig. 3 I have son'iewhalt exaggerated theangle of inclinln tion of the electrodes in order to illustrate theprinciple of operation of my invention in respect of the relativeadjustments above mentioned; and consequently, shown in ssid figure,said carbons or electrodes do not project to the distance within thefurnacechamber that said electrodes will occupy when the plant is inoperation. In practice the electrodes occupy a more nearly verticalposition than that shown in said figure. I have shown only two carbonholders and supports, and the foregoing description of parts applies toeither of such holders and supports, as the construction and arrangementthereof and of the adjusting mechanism therefor is the same in eachcase.

lhave above explained that the upperencls of the supports 8 projectthrou 11 slots or openings in the top plate or roof the casing or hopperB or extension W thereof. The slots T and the extensions W are, asshown, of just sulhcient extent or width to freely so coinmodate theupper ends of the supports. In practice I arrange the projecting ends ofsupports S to project through insulating blocks or plates B, suitablytrunnioned or journaled, as at C", (see Figs. 14 and 15,) inslide-guides A, said slide-guides being mounted to slide freely along orlengthwise with respeotto the slots '1". By this construction not onlyare the supports S insulated, but the swinging movements thereof duringtheir adjustments are accommodated. In practies the insulating-bearingsB are of porcelain.

In order to cover the slots TE while permitting the swinging movementsor adjustA merits of supports 5, i provide a series of cover-pistes D,suitably hinged or pivoted together, as clearly shown, in connectionwith siot T',-so as to be Rout in accordance mentstpffjsaid supports,thereby forming-a fcover for the slots T in whatever position ofad'ustment'said supports are moved into.-'

order toen'able the carbons and their fielded up or to be drawn "th theswinging moveholders and supports to be shifted or adjusted-- intonearlyI vertical position without interferelice of theprojecting endsof the suports I ':o S'%with the stack D, I prefer to provi e said 3 holders Svat some convenient'point intermediate their ends, as indioatedf'a't E,with a bend or offset, as clearly shown in Fig; 3.,

. In order to efficiently maintainthe carbon- I r 'r-holdersandjtheirsupports cool, so as to avoid burningthe-sameout under the intense heat"to which they are subjected, I- provide said :supports with channels orchambers F. G, extending throughout the lenththereof andeo'comrniinicating with each otherwithin the hollow chamber Htof holderM",'an'd. I arrange a suitablehose or: other connection N P, torespectivelycommunicate with asource of supply and exhaust of acirculating or cool- 5- ing medium. p

' to maintain the entire holder and its support Inthis manner Iainenabled cool throughout the entire length thereof.

The leading wires of theelectric circuitarev suitably eonnectedfby-clipsor in any other I convenient manner, as at-Rf, to copper or otherconducting strips s; I hese conducting -strips extei-idlongitudinallyalong the 'supports smnd at thein lowerehds are bent .1 oii'twardl an'suitablyclampedby means of clips .he'rwisle to the holder M.

" Of co se-it will be understood that the ad- "justing 'gearing.shouldbefsuitably a properly insulated inforde'r to preventsp'rt 1cir- .cuitsand to protect the attendant from" re 4d fceivingashock when thehand-wheels G, E";

or N are manipulated; The particular aror. charge is then deliveredthrough .the open-a]. going It and spout A into thespace between theelectrodes andunder the influence of the heat enerated is-fusedorfmelted' and convertedinto carbids- If".- I f By the adjustments'hove. described the relative posi-tionsotthe carbons orelectrodes,their. relative inclinationor proximity,

may be adjusted to accommodate the 'charac ter or quantity of the chargesupplied or the character. or quality ofcurrent employed. 6o 'flhefusedgor moltenmass is tapped or withrawn from thefurnace-chamberthrough the f {huge-openings A. When the furnace p. ber.becomesclogged for any reason, the rrentis shut ofi, the electrodes.raised'until i -clear of the furnace-chamber, the ram G moved alongthetracks F and the hinged lowered, and thef uruac'e-ohamber shifted orbottom-of said furnace-chamber opened, and

' independent-adjustments of the carbons or electrodes I am enabled toconstantly maintain the arcat the lower eiids'of the electrodes. 1 amalso enabled, td so relatively adjust the carbons as toicause the sameto. be consumed or. eaten away in unison, thereby maintaining results.

the I electrode operating mechanisms entirely inclosed within, thecasing a highly-improved construction is obtains Such constructionenablesthe casing. to be made subout any holes or openings therein, so,that the air within the casingis retained therein. It

. air within the casing, for the reason that such oxidation. tunityforcirculation of air within the fur- "sulating medium. [In addition tothis the currents from striking and injuring the heated parts andalsdjpreyents heated and noxious ases from-entering the room in 'whichthe urnace is located. l p In a co ending application executed July 14,1902, erial No. 1 16,6.69,I have described delivered to t e furnaoe in ahighly-heated condition. The present invention is designed for use inconnection with such Zlhethod, lSiltg-aris not lirnited or restricted:fligisetO'. Tlleihdvantage arising amasslivering'ajhighlyrheated chargeto the elec- Ihavef shown and described specific consthucjtjonsasoperative embodiments of vaiiatiplisond --c}1anges in -the details ofconcur tdpersonsskilled in' th e in"- and still fall the spirit andscope of my invention;

Having now set forth the object and -nature of m invention an a construction 5111- "libdyfi'ng"the principles ,t ereoflwhat I claim las newand'useiul and of my invention, and desire to secur'ebyLettersPatent',-,i-s+

ber, electrodes projecting intgrhaid chamber, means for adjustin' theinclination of said ele tildes, indie en ent means for adjustingfjusting the e ten' tof projection of said electhe chamber cleaned out.By reason of the.

constancy of are and securing more uniform is advanta eous to so confinea sin le bod of uses, so that such-air constitutes a betterinclosedcasing construction" prevents cold air a method of oplerationin whichthe charge is trio furnace-.j-isthhf smaller current is relqi ired toeiie'ct the melting, fusing, or,con---- Y GI' lOHvi 1 1. I11 an electricfglrnace, a furnace-cham- It will be seen that 'by, the method of ha v i-st'antia'llly closed throughout its surface witha confined airbecomes:deprived of its oxygen,

whereby the lelectrodes are less subject to Moreover, thereis -le'ss;oppo1--- thefeatufs oi rny invention, I do not desire tobellimited on;restricted thereto, as many structiir'fa nd arrangement wouldreadily'ocs delectrod *sa/tefally, and means for adtrodes into saidchamber, as and for the purpose set forth.

2. In an electric furnace, a furnace-chainher, a plurality of electrodesarranged to pro-- ject into said chamber, means for adjusting therelative inclination of said electrodes, means for adjusting theproximity of said electrodes, and means for adjusting the extentpfprojection of said electrodes into said chamber, all of said adjustingmeans being independent of each other, as and for the pur pose setforth. 3. In an electric furnace, a furnace-chamher, an electrodearranged to project into said chamber, said electrode, provided witha'seat or. recess, a block having a seat. adapted. to receivesaidelectrode, a lug, formed in said seat and. arranged to be receivedin said recess, means for clamping said electrode in. said seat, and aholder arranged to-incase and surround said block, as and for the purposset forth d. In an electric furnace, a carbornholder provided withseats, blocks arranged to be removably received in said seats, and meansfor clamping carbon slabs in said blocks,. as

and for the purpose set forth.

5. an electric furnace, at carbon-holder having seats, blocksarrangedtobe removably receivedinsaid seats, means for clam ing said blocks insaid seats, and a earbon for eachblock, and means forremovably clam-pring said carbons in said blocks, as auditor the purpose set. forth.

6. In. an electric furnace, at carlbon holder having a plurality ofseats, a block arranged to be received in each seat, a strap connectedto each block, means for removably clamping said straps to said holder,whereby said blocks may be independently removed, and a carbon arrangedto be removably received in each block, asand for the purpose set forth.

7. In an electric furnace, a holder having seats, a lug or projectionassociated with each seat, a block arranged to be received in each seatand provided with a pivoted strap arran ed to be received over a lug orprojection. upon said holder, a carbon, and means tor ITBHIOVELbl-Yclamping said carbon in said block, as and for the purpose set forth.

8. In an electric furnace, a carhon-holder, a block adapted to besupported thereby, 'd block proyided with a seat, a carbon opted to bereceived insaid seat, aclaniping-plate arranged to be applied to saidcarbon, and a set-screw tapped through said block and engaging said claming-plate to clamp said carbon to. said bloc as and for the purpose setforth.

9,. In'an electric furnace, a carbon-holder, a block arranged to bereinovably supported thereby and providedwith a seat, said seat havinga. recess, a carbon adapted to be receivedin said seat, aclamping-plateadapted said support provided With rack-teeth, and

gearing arranged to enga e said rack-teeth to longitudinally adjust saisupport, as and for the purpose set forth. 7

11. In. an electric furnace, a furnace-chamber, an electrode, a supporttherefor, means for engaging said support, and worm-and screw gearin forrocking said engaging "means, Where y said support may be tilted,

as and for the purpose set forth.

12. In an electric furnace, a turmer c-chamher, an electrode, a supporttherefor, a shaft,

bearings swiveled on said shaft and-arranged to receive said supporttherebetweenand to engage the some, and meansfor rocking said hearingsto adjust the angular position of said support, as and for thepurposeset forth.

'13. In an electric furnace, afurnscachamher, an: electrode, a supporttherefor, ashaft, plates carried by said shaft and having anglearmsarranged. to.- embrace and form a hearing forsaid support, and means fortilting said arms, as and for the purpose set forth.

14:. In an electric furnace,a furnace-chamber,.an electrodes supporttherefor, suitablyjournaled" sleeves carrying plates, anglemrms carriedby saidplates, bearings respectively f mounted upon saidsleevtes and:arms and arranged to respectiyely engage said support on opposite sidesto form; bearings therefor, and,

means for rotarily adjusting said sleeves to,

tilt said support, as and for the purpose set forth. I 15. In anelectric furnace, a furnace-chamber, an electrode, a sup aort thereforprovided with a rack extending iongiturli-nally thereof, atransversely-journaled shaft carrying a pin ion engaging said rack, asleeve mounted upon said shaft and carrying bearingoints arranged toembrace and engage sai support, and means for independently rotatingsaid shaft and sleeve, as and for the purpose set forth.

16. In an electric furnace, a furnace cham oer, an electrode, a supporttherefor, bearings arranged to embrace and maintain said support, ashaft upon which said bearings are mounted, journal-boxes for saidshaft, and means for laterally adjusting said journalboxes, as and forthe purpose set forth.

17. In an electric furnace, a hopper or casing, a furnace-chamberconnnunicating therewith, an electrode, a support therefor, a shafttransversely journaled in said hopper or casmg and carrying bearing-armsarranged to embrace and maintainsaid support, slidefor the purpose setforth.

ing through w ichs'aid slide-guide for said support, and means for 2oadjusting the position of said support, as and for-the .urpose set boxesin which said for the urpose set ad'usting the shaft is mounted, and.said slide-boxes, as and orth.

furnace, a hopper or cas- With a smoke-stack, a furnacemeans foradjustin a 18-. nan electric ing provided.

chamber, anelectrode' suppor ed in said hop er or casing andprojectingiinto said chamer, a support for said electrode, means-forinclir ratio'n offsaid support with re erence to said chamber, saidsupport havingan offset or;bend in'the length thereof whereby clearanceis left for the stack, as and forth. 20. n anj-electric furnace, ahopper, a fur-i naceechamber, an'electrode, a sup ort for a slot oropening therethrough', a furnace-- chamber, an electrode, a support forthe lati pose set forth.

said electrode, said hopper rovide with a slot, a slideguide mount-e tomove along said slot, a bearing-block journaled in said slide-guide,said support operating loosely through said bearing-block, and means foradjusting said support, as and for the pur 21." In anele'ctric furnace,a hopper having ter, said support projecting t hrouglr said slot.

or open ng-mews for adjusting said support,

and" means operated by the movement of said L support intoadjustedposition for constantly maintaining Sitld, slot OF'OPEDIDgclosed, as

andfor the purpose set forth.

, support tl'ierefor, a shaft, said holder bearin upon said shaft,plates means chamber,

- to i receive said, support loosely therethrough,

bl'e cover connected I support therefor, Y mounted thereon and arrangedto form a ried by said shaft I a hopper having slot o'rl pening'therethrough, a furnacean electrode, 1 support for the latter, aslide-guide arranged .to move along the slot or opening in said hopperand adapted [22. In an electric furnace,

means for adjusting said support, and a flexito said slide-guide andoperatingto close said slot or opening in whatever position said supportis shifted or adjusted, as and for the pur ose set forth.

23. In an electric iin'nace, an electrode, a

v mounted upon sai shaft and each havin arms arranged to extend beyondsaid ho der, the arms of one plate being connected to the arms of theother in position to form additional bearings upon the opposite side orface of said holder, and for turning the shaft to adjust the samerotarily, as and for the purpose set forth. 2%. in a tric furnacefanelectrode, a a shaft having rollers bearing for one side ol'said holder,arms cararranged to pro ect beyond 'trodes, a furnaceforth.

the other side of such holder to form additional bearings therefor, saidarms carry ng on said arms for tilting'the same, as and for the purposeset forth. 25.

or casing having bearing-rollers, and means positively acting SlgPOIi-Sfor a pair of elecamber laterally removable from beneath the casing, apressure device for elevating said member against the casing, andmean-for withdrawing the electrodes out of said furnace-chamber tofacilit'ate'its removal, as and for the purpose set forth.

26. In an electric furnace, an up er portion or casing having a pair ofelectro es, alower member or furnace-chamber into which said electrodesreject, and mechanism wholly in' closed Wit iin saidcnsing for adjustingsaid electrodes, as and for the purpose set forth,

27. in an electric furnace, an upper portion or casing having a pair ofelectror. es, a lower member or furnace-chamber into which saidelectrodes project, and mechanism wholly included Within the casing andoperated by shafts extending through the Walls thereof for adjustingsaid electrodes, as and for the urpose set forth.

2&5. In an electric furnace, an up er portion or casing having a pair ofelectro( es, a lower member or furnace-chamber into which sci electrodesproject, and mechanism wholly included within the casing and operated byconcentr' c shafts extending through the walls thereof for adjustingsaid electrodes, as and for the purpose set forth.

29. in an electric or casing having a'pair of electrodes, a lower memberor furnace-chamber into which said electrodes project, and mechanism 0erated by concentric shafts for tiltin and adjusting said electrodes,

3}) In an electric furnace, an up er portion or casing having a pair ofelectro es, a lower member or furnace chamb er into which saidelectrodes project, and mechanism 0 eratcd as and for t e purpose set470 In an electric furnace, an upper portion.

furnace, an upper portion Lie by concentric shaftsfor tilting. and austing i said electrodes longitudinallyand. rotarily,

and'forihe purpose set forth. c

31. In anelectric furnace an upper portion or casing having a pairofciectrcdes, a lower. member or furnaceelectrodes project, mechanismoperated by concentric shafts for adjusting said electrodes, and meansshafts, as and for the purposeset forth.

32. In an electric furnace, an up 361' portion or casing having a pairof eleotro ,es, a lower member or furnace-chamber into whiclt l saidelectrodes project, and mechanism ispo within; the casing and adjustablelaterally whereby the electrodes may be shifted int'oga su stantiallyverticabp'osition', as and fonthg purpose set-forth. 1

h'a'mb er into .which sa d for laterally a'djustin'g sa1d- )9 J. ofelectrodes on c 1 enin in the casin throue'h i I =2 0 which portions oran electrode pro ect, and

means for closing the space of said opening which is not occupied bysaid electrode, as

and for the purpose set forth.

34. In an electric furnace, pair oi electrodes, end lnechenisin forlaterally, longitudinally and. roterily adjusting the same, and for thepurpose set forth,

35. In an electric furnace, a pair of electrodes, end mechanism includedwithin the cesi for laterally, longitudially snd roterily adjusting thesome, as and for the purpose s t forth.

36. In an electric furnace, a melting-pot,

en enlarged casing above the same, electrodes included Within thecasing,=snd mechanism for adjusting said. electrodes erranged in offetrelation With respect thereto, whereby uid electrodes may be shiftedinto a substanie-lly vertical position adjacent to one anther, as andfor the purpose set forth.

In an electric furnace, on upper portion or casing having a stack, end apair of elecc) r1 o: m

In an electric furnace, 'e casing, s'puir trodes, a lower member orchamber into which said electrodes project, supports havingleter-rtllywil'lset portions, the electrodes being mounted on ridlaterally-onset portions, whereby a movement. of the supports intoproximity to the stack moves the electrodes into proximity to eachother, as and for the purpose set forth.

In an. electric furnace, an upper portion or casing, :i lower member orfurnace-charm her ren'iovn-bly located beneath said casing and havingd1schnrge-openings in the side thereof, a complete system ol electrodesall supported entirely-1min the-upper casing and out of contact with thelower casin and u truck for laterally removing said rnzicechznnber, asand for the purpose set forth.

In Witness whereof I have hereunto set my hand, this 19th day of July,1902, in the presence of the subscribing Witnesses.

HERMAN L. HARTEN STEIN. VJitnesses:

E. U. SEMPLE, SE. Dimer.

